The fungus turned out to be the entertainingly named Witches' Butter (Exidia glandulosa). Even better those helpful folk on Ispot also pointed out that the lichen growing underneath it is the common, pollution tolerant species Parmelia sulcata. That takes the lichen count for the challenge to two, after I'd earlier found a very helpful article on the Bedfordshire natural history society website, which allowed me to identify a bright yellow lichen I'd found growing on hawthorn as Xanthoria polycarpa.
|Witches' Butter - doesn't look very tasty!|
Total: 40 Species - see all the photos here